Quantcast Equipment Room and Entrance Facility

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MIL-HDBK-1012/3
support strands or may be lashed to existing cables if the poles
and strands are rated to support additional cable weight.  When
installing fiber optic cable, service loops of 8.2 m to 17 m
(25 ft. to 50 ft.) should be placed every 100 m (300 ft.) along
the pole line.
Aerial support structure engineering, design,
and construction information can be obtained from EIA/TIA 569,
BICSI Manual, Chapters 2 and 21, and the following REA TE&CMs;
602, Clearances, 605, Right of Way Clearances, 611, Pole Lines,
626, Staking, 630, Design of Overhead Lines, and 635,
Construction of Overhead Lines.
1.9
Equipment Room and Entrance Facility.  Equipment room
is the designation given to the specific telecommunications
closet where the building's telecommunications, e.g., PBX,
computing, main cross connects, and video equipment are located.
See Figure 18.  The entrance facility of a building represents
the transition point between the external distribution backbone
and the building distribution system and is the point where
outside cables coming from the service entrance are terminated
and protected.  In many instances the two functions may be
incorporated within the same room.  The design elements for each
room are basically the same.  For the purposes of this handbook,
the term "equipment room" has been selected to represent the
design elements for both functions.  The equipment room should be
of sufficient size to accommodate cable distribution points such
as backboards, terminal blocks, fiber optic distribution centers,
splice cases, etc., electronic interface equipment, digital
switching system (DSS), fiber optic interface/transmission
equipment, LAN bridges, routers, multiple access units, etc.,
line interface units (LIUs), channel banks, and multiplexing
equipment as required.  The equipment room can be a mixture of
individual or integrated functions necessary to provide
information support services to the building.  The critical
design elements associated with an equipment room are:  location,
size, physical layout, power, isolated ground, and environmental
conditioning.  Size entrance ducts are shown in Example Six.
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